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Author Topic: AERO  (Read 11163 times)

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Offline debgeo

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AERO
« on: March 11, 2014, 03:51:10 PM »
Powered by bicycle  88 MPH
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Offline WOODY@DDLLC

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Re: AERO
« Reply #1 on: March 11, 2014, 06:38:44 PM »
http://www.recumbents.com/wisil/whpsc2013/results.htm
Date     9/14/2013
Rider     Sebastiaan Bowier
Vehicle Name Velox 3
New design in the works: http://www.hptdelft.nl/en/
Speed MPH 83.13
Speed KPH 133.78
 :cheers:
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Offline debgeo

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Re: AERO
« Reply #2 on: March 12, 2014, 02:05:00 PM »
THANKS for correction Woody.
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Offline SteveM

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Re: AERO
« Reply #3 on: March 16, 2014, 06:13:18 PM »
Very impressive speed. I wonder if there is power data available for that run?  I'm guessing 1,000+ watts average.
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Offline Jack Gifford

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Re: AERO
« Reply #4 on: March 17, 2014, 01:09:37 AM »
Quote from: SteveM on March 16, 2014, 06:13:18 PM
... I'm guessing 1,000+ watts average...
Maybe. I don't know if a human can apply about 1.5 HP or not.
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Offline Stainless1

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Re: AERO
« Reply #5 on: March 17, 2014, 09:32:28 AM »
Quote from: Jack Gifford on March 17, 2014, 01:09:37 AM
Quote from: SteveM on March 16, 2014, 06:13:18 PM
... I'm guessing 1,000+ watts average...
Maybe. I don't know if a human can apply about 1.5 HP or not.

Maybe for 8 furlongs...  :-D
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Offline fordboy628

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Re: AERO
« Reply #6 on: March 17, 2014, 11:40:34 AM »
Quote from: Stainless1 on March 17, 2014, 09:32:28 AM
Quote from: Jack Gifford on March 17, 2014, 01:09:37 AM
Quote from: SteveM on March 16, 2014, 06:13:18 PM
... I'm guessing 1,000+ watts average...
Maybe. I don't know if a human can apply about 1.5 HP or not.

Maybe for 8 furlongs...  :-D

I vaguely remember reading something about top Tour De France riders being able to produce 800 watts for short periods of time.    As in climbing mountains.    Power for average riders was 700/750 watts.

745.7 watts/hp

Average U.S. male Olympic athlete (non-cyclist) tested @ .5 hp  approx. 373 watts
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Offline metermatch

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Re: AERO
« Reply #7 on: March 23, 2014, 01:08:42 PM »
They couldn't go any faster than 88 mph because whenever they did, they went back in time...

Jeff
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Offline salt27

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Re: AERO
« Reply #8 on: March 23, 2014, 01:51:16 PM »
Quote from: fordboy628 on March 17, 2014, 11:40:34 AM
I vaguely remember reading something about top Tour De France riders being able to produce 800 watts for short periods of time.    As in climbing mountains.    Power for average riders was 700/750 watts.

745.7 watts/hp

Average U.S. male Olympic athlete (non-cyclist) tested @ .5 hp  approx. 373 watts

Is that with or without performance enhancing drugs.   :roll:
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Offline 1212FBGS

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Re: AERO
« Reply #9 on: March 24, 2014, 09:34:55 PM »
got any shapes like that on your hard drive Woody?
kent
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Offline WOODY@DDLLC

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Re: AERO
« Reply #10 on: March 25, 2014, 06:08:07 PM »
Kent, if I tell you I have to kill you!  :-D  However, I do have a concept for a 100+ mph human powered vehicle but can't get anyone interested in building it. Would be a great university project!  :cheers:

This shape was optimized analytically for the velocity/pressure distributions at the chosen speed range of 80~85 mph. [Laminar flow thingy!] Add 100, 200 or 300 mph and it all changes. The previous record holder was an "organic" design by a sculptor. http://www.varnahandcycles.com/hpv.htm The air getting into the wheel wells is a killer for these machines.  :-(

Now where did I put that weed-whacker engine and the model airplane fuel?  :?

There was a CFD study done that "proved" that if the second place guy would have cut his ponytail he would have beat the "enhanced" Lance! About 9 grams of drag is considered the theoretical difference between first and second place - all other enhancements being equal!  :-o
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Offline dw230

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Re: AERO
« Reply #11 on: March 25, 2014, 06:24:04 PM »
9 grams is approx. 4 times the weight difference in a NASCAR connecting rod that means legal/illegal for a competition imbalance.

DW
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Re: AERO
« Reply #12 on: April 05, 2014, 12:04:35 AM »
Took a while to find this, it was farther back than I thought

http://www.landracing.com/forum/index.php/topic,4084.0.html

Max HP for a trained rider in recumbant position is just over 2HP.  Much better than a conventional bicycle position.
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Offline tauruck

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Re: AERO
« Reply #13 on: April 05, 2014, 02:49:16 AM »
Quote from: WOODY@DDLLC on March 25, 2014, 06:08:07 PM
Kent, if I tell you I have to kill you!  :-D  However, I do have a concept for a 100+ mph human powered vehicle but can't get anyone interested in building it. Would be a great university project!  :cheers:

This shape was optimized analytically for the velocity/pressure distributions at the chosen speed range of 80~85 mph. [Laminar flow thingy!] Add 100, 200 or 300 mph and it all changes. The previous record holder was an "organic" design by a sculptor. http://www.varnahandcycles.com/hpv.htm The air getting into the wheel wells is a killer for these machines.  :-(

Now where did I put that weed-whacker engine and the model airplane fuel?  :?

There was a CFD study done that "proved" that if the second place guy would have cut his ponytail he would have beat the "enhanced" Lance! About 9 grams of drag is considered the theoretical difference between first and second place - all other enhancements being equal!  :-o

I'll build it. :wink:
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Offline fordboy628

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Re: AERO
« Reply #14 on: April 05, 2014, 07:23:55 AM »
Quote from: tauruck on April 05, 2014, 02:49:16 AM
Quote from: WOODY@DDLLC on March 25, 2014, 06:08:07 PM
Kent, if I tell you I have to kill you!  :-D  However, I do have a concept for a 100+ mph human powered vehicle but can't get anyone interested in building it. Would be a great university project!  :cheers:

This shape was optimized analytically for the velocity/pressure distributions at the chosen speed range of 80~85 mph. [Laminar flow thingy!] Add 100, 200 or 300 mph and it all changes. The previous record holder was an "organic" design by a sculptor. http://www.varnahandcycles.com/hpv.htm The air getting into the wheel wells is a killer for these machines.  :-(

Now where did I put that weed-whacker engine and the model airplane fuel?  :?

There was a CFD study done that "proved" that if the second place guy would have cut his ponytail he would have beat the "enhanced" Lance! About 9 grams of drag is considered the theoretical difference between first and second place - all other enhancements being equal!  :-o

I'll build it. :wink:

Where do I sign up for the team?

My PowerAde ration can go to the cylclists, I'll be swilling something "better".    :wink:

The model airplane fuel I'd use is the stuff with Nitro . . . .
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Science, NOT Magic . . . .

I used to be a people person.  But people changed that relationship.

"There is nothing permanent except change."    Heraclitus

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